Avisynth plugins no longer loading

[rsd2015]

My previously working avisynth install and plugins running under Windows 10 x64 now refuses to load external plugins with Set's MT 2.60 2/20/2015 build (e.g. nnedi3.dll and Shader.dll won't load). Dependency walker shows error with c:\windows\system32\MSVCRT.DLL and errors with API-MS-Win-core-Console- L1-1-0.dll, and other dlls. How to troubleshoot? Does this error indicate a missing C++ run time library? Any advice appreciated.

[Groucho2004]

It's recommended to make sure that VC++ runtime components of all known version (2005~2015 at the moment) are installed. Download and install all Redistributable Packages (both x86 and x64) listed at https://support.microsoft.com/en-us/kb/2977003.
A much better option is ricktendo's all-in-one installer (http://www.wincert.net/forum/topic/9790-aio-microsoft-visual-bcfj-redistributable-x86x64/) which is convenient and has all the MS setup junk removed. However, I think you have to be registered on the wincert forum in order to download but that only takes a minute.